I've placed an additional subpattern in the matching pattern which matches only the part of the link after the http://
It basically matches like this: ([url]http://(www.website.com[/url])) which sets the following back-references for the replacement

I've placed an additional subpattern in the matching pattern which matches only the part of the link after the http://
It basically matches like this: ([url]http://(www.website.com[/url])) which sets the following back-references for the replacement